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The Upper Tisa Valley. Preparatory proposal for Ramsay

The Upper Tisa Valley. Preparatory proposal for Ramsay

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Hygienic bacteriological valuation of the <strong>Upper</strong> <strong>Tisa</strong> Region<br />

Judit Soós<br />

Introduction<br />

<strong>The</strong> load of organic and inorganic pollutants on waters increases year by year.<br />

<strong>The</strong> increase of the level of organic pollution is indicated by the worsening of hygienic<br />

bacteriological characteristics of rivers and lakes. Csépai (1995) reported on the same<br />

tendency in River Maros. <strong>The</strong> present paper analyses the pollution effect of River<br />

Szamos and presents the bacteriological characteristics of the Ukrainian upper section<br />

of River <strong>Tisa</strong>. <strong>The</strong>se parameters are compared with the bacteriological values obtained<br />

<strong>for</strong> the North Hungarian section of the river.<br />

Keywords: hygienic bacteriology, <strong>Upper</strong> <strong>Tisa</strong><br />

Material and Methods<br />

We took samples at 9 sites on the Ukrainian section of the <strong>Upper</strong> <strong>Tisa</strong> between<br />

16-18 August 1995. <strong>The</strong> samples were kept in cool and sterile glass vessels until the<br />

investigations commenced on 18 August 1995. Coli<strong>for</strong>m and Faecal coli<strong>for</strong>m bacteria<br />

were detected according to Hungarian Standards No. MSZ ISO 9308-2:1994. Numbers<br />

of Faecal streptococcus were determined according to Hungarian Standards No. MSZ<br />

448/44:1990, and the total number of colonies was obtained according to Hungarian<br />

Standards No. MSZ ISO 622:1992.<br />

Results and Evaluation<br />

Nine water samples (numbered in accordance with the direction of flow) were<br />

taken in the Ukrainian catchment area of the <strong>Upper</strong> <strong>Tisa</strong> section, at the following<br />

locations:<br />

Sampling sites: 1. Chorna <strong>Tisa</strong>, 2. Bila <strong>Tisa</strong>, 3. <strong>Tisa</strong> below Rachiv, 4. <strong>Tisa</strong> at<br />

Dilove, 5. <strong>Tisa</strong> above Tereblia, 6. Tereblia at confluence, 7. <strong>Tisa</strong> at Viskove, 8. <strong>Tisa</strong> at<br />

Vinogradiv, 9. <strong>Tisa</strong> at Vilok<br />

349

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